Here's the response to an e-mail I sent to Gommert:
Hi,
This means the software did not get a reply from the scanner within a set time frame.
This should rarely happen, first make sure you run the latest ARc396
1.022 release.
Howmany memory is used in the 396? The more systems are stored in the 396, the slower the scanner replies to serial commands.
Also lowering the baudrate may help. Finally we have seen this with some USB converters, if you use USB check the suppliers website for an up to date driver.
Kind regards,
Gommert Buysen
www.butelsoftware.com